You input a known orbit into this program. It will then calculate the mass of the body being orbited. You then input a new altitude in terms of radius and it will calculate the speed required to be in orbit at that distance. Instructions

You pick a rainbow, one color or range of colors to cycle over time, then place your Acrylic sign, prism, glass or over object on your phone or tablet to light up and turn your device into an artistic display to light up the whole room! Instructions